10-30-2015, 07:39 PM
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#1 (permalink)
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Master EcoModder
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A new welding technique.
This may help make "composite" bodies more viable in the near future.
https://news.osu.edu/news/2015/10/29/vfaweld/
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10-30-2015, 07:50 PM
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#2 (permalink)
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I can see galvanic corrosion still being an issue, but a very intriguing technique.
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10-31-2015, 12:42 PM
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#3 (permalink)
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Master EcoModder
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Micro explosive welding - cost effective, versatile, and can weld without destroying parts. But no KABOOM.
I used to work at a place where the owner heard about explosive welding, so he went out into his backyard with some dynamite and experimented.
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10-31-2015, 02:20 PM
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#4 (permalink)
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Master EcoModder
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I don't get it. The exploding strip of aluminum forces the one material against the other? Like a spotweld?
OTOH, galvanic corrosion requires an electrolyte. The welds themselves are in close contact, maybe unwelded areas might be a problem.
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11-01-2015, 11:56 AM
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#5 (permalink)
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Master EcoModder
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Sounds interesting... wonder if this means you'll need a jig or a form to weld on... or if it is possible to simply align the parts in a body shop, slap the explosive strip along the area you want the seam at, and set it off...
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11-02-2015, 04:09 AM
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#6 (permalink)
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Master EcoModder
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Part of the process must be setting the parts together, plus the explosive, so that the energy goes where intended. For example, making sure the parts don't weld themselves to the jig.
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11-02-2015, 06:55 AM
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#7 (permalink)
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Master EcoModder
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For lack of a betteer plan, I went back and read the linked article; and I found a link to
https://iml.osu.edu/vaporizing-foil-...ght-structures
Quote:
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This pressure pulse from the expanding gas can be used to drive workpieces for various purposes, such as forming, shearing, tube expansion, and small-scale collision welding.
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Where there is a video
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11-02-2015, 04:47 PM
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#8 (permalink)
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Master EcoModder
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For anyone still interested, heres the Impulse Manufacturing Laboratory at OSU channel on Youtube:
https://www.youtube.com/channel/UCKw...4kIfJ1Q/videos
They have ten videos up. Similar to hydroforming, this is a process that allows small scale forming and welding that would be done with explosives on a larger scale. Generally the forms for something the size of the palm of your hand is constructed with 1 1/2" steel plates and 3/4" bolts. The explosive foil is like an old VW Beetle fuse (both types!). And it's set off inside a blast cabinet.
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